Road-grader.



RQAD GRADBR. APPLIUATIO FILED MAY 24, 1904.

N0 MODEL.v

.-Witnsses I I w f'jvlnventor.' 5W b9 N man STATES Patented September 13, 1904.

,ar-awr @trice ROAD'GRADER.

SPECIFICATION forming part of Letters Patent No, 770,145, dated September 13, 1904,

Application filed May Z4, 1904, Serial No. 209,512. (No model() T0 rif/ZZ 111710711/ t nur/y cm1/cern:

Beit known that I, WILLIAM ALooRN, a citizen of the United States, residing at Gardengrove, in the county of Decatur and State of Iowa, have invented a new and useful Road- Grader, of which the following is a specification.

This invention relates to improvements in implements for grading and scraping roads and for similar purposes, and has for its object to improve the construction and produce a device of this character of increased efhciency and greater steadiness of action, while at theV same time possessing the requisite yielding qualities to ad apt it to the surface of the ground over which it operates.

With these and other objects in view, which will appear as the nature of the invention is better understood, the same consists in certain novel features of construction of a roadgrader, as hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which corresponding parts are denoted by like designating characters, is illustrated the preferred form of the embodiment of the invention capable of carrying the same into practical operation, it being understood that the invention is not necessarily limited thereto, as various changes in the shape, proportions, and general assemblage of the parts may be resorted to without departing' from the principle of the invention or sacrificing any of its advantages, and the right is therefore reserved of making all the changes and modifications which fairly fall within the scope of the invention and the claims made therefor.

In the drawings thus employed, Figure 1 is a perspective view of the improved device. Fig. 2 is an enlarged detail, partly insection, of the rear portion of the device, illustrating the construction of the yieldable joint between the parts.

The improved device comprises two side members 10 11, disposed in reversely-inclined positions with their rear ends relatively close together and their forward ends diverging' and provided with the usual draft-rods 30 31.

rlhe inner or adjacent faces of the members 10 11 are provided with lay or scraper plates 12 13 to receive the impact of the ground and having spaced vertical slots 14 to receive clamp-bolts 15, by which means the plates maybe adjusted vertically, as required. The members 10 11 will preferably be of wood and the scraper-plates of steel and will be interchangeable, so that when the lower front edges become dulled or worn round the plates can be shifted to bring' the unworn edges upon the active side, and then as these exposed edges wear away the formerly-worn edges again become sharpened and can be again exposed by again changing the scraper-plates, and so on as often as required. The scraper-plates thus become self-sharpening until entirely worn out.

Attached to the outer faces of the members 10 11 near their rear ends are cylindrical studs 16 17, extending both above and below the upper edges of the side members, and movably mounted upon the upper portions of said studs is a stay-bar 18, the stay-bar having depending concave-faced blocks 19 20, conforming to and bearing against the outer faces of the rounded portions of the studs 16 17 below the upper line of the side members 10 11. By this simple means the stay-bar 18 unites the members 10 11 flexibly, and the blocks 19 2O effectually brace the same and prevent them from overturning, as will be obvious.

Connected to theside members 10 11 near their rear ends are studs 21 22, extending for a distance above the upper edges of the side members and `pivotally connected by a staybar 23, and similar s tuds 24 25 are attached to the side members near their forward ends and connected by a pivoted stay-bar 26. The staybars 23 26 being thus located at a considerable distance above the side membersl present a strong resistance to the outward strains, which would otherwise overturn the side members, and thus eifectually hold the scraper members up to their work. Additional studs 27 28 are provided in advance of the studs 24 25 and pivotally united by a stay-bar 29 to still fur ther increase the strength of the coupling between the side members, whilenot interfering with its flexibility.

The studs, draft-rods, scraper-plates, concaved blocks, and clamp-bolts will be of metal, while the side members and stay-bars will IOO generally be of wood of suitable size and strength. v

It will thus be obvious that a very simplyconstructed and eflicient scraper and leveler is provided, which will readily yield to all the changes in the surfaces over which it is operated, but which will be held rigidly to its work and prevented from overturning or displacement under the most severe strains.

Having thus fully described the invention, what is claimed isA l'. In an implement of the class described, two reversely-inclined side members having cylindrical studs extending therefrom near the rear ends, a stay-bar having spaced apertures for engaging said rear studs and with concaved depending blocks for bearing against the outer faces of said rear studs, and a stay-bar pivoted by its ends to the side members near the forward ends of the same.

2. In an implement of the class described, two reversely-inclined side members having' cylindrical studs offset from and extending above and below the upper edges of the side members, a stay-bar pivoted upon said rear studs and resting upon said side members and provided with concaved depending blocks for bearing against said rear studs below the up per edges of said side members, and a staybar pivoted by its ends to said side members near the forward ends of the same.

3. In an implement of the class described, two reversely-inclined side members having cylindrical studs extending therefrom near the rear endsa stay-bar having spaced apertures for engaging said rear studs and with concaved depending blocks for-bearing against the outer faces of said rear studs, studs extending above said side members near their forward ends, and a stay-bar pivoted by its ends to the upper extended ends of said for'- ward studs, whereby theyside members are supported against overturning strains.

L In an implement of the class described, two reversely-inclined side members having cylindrical studs extending therefrom near the rearA ends, a stay-bar having spaced apertures for engaging said rear wstuds and with concaved depending blocks for bearing against the outer faces of said rear studs, studs spaced apart and extending above said side members near their rear and forward parts, and staybars pivoted to the upper ends of said extended studs.

In testimony that I claim the'foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

WILLIAM ALCORN.

Witnesses S. H.- AMos, SAMUEL WHEELER. 

